To repair FDM 3D printed miniatures, fix common issues (layer gaps, stringing, warping) using basic tools like sandpaper, hobby knives, and fillers.
Layer gaps: Fill with melted PLA scraps or epoxy. Stringing: Cut excess with a hobby knife and sand smooth. Warped bases: Heat gently with a hairdryer and flatten. Use 200–400 grit sandpaper to smooth layer lines; small cracks need UV resin for precision.
Beginners should start with minor repairs (stringing, small gaps) and test fillers on scrap material first to match the miniature’s plastic (PLA/ABS) before working on details.